Silas harris



S. HARRIS. RAILWAY CHAIR.

Patented July 5, 1892.

(No Model.)

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Winesses:

UNITED STATES PATENT OFFICE.

SILAS HARRIS, OF SAN FRANCISCO, CALIFORNIA, ASSICNOR To THE PACIFICROLLING MILLS COMPANY, OF SAME PLACE.

RAILWAY-CHAIR.

lSPECIFICATION forming part of Letters Patent No. 478,427, dated July 5,1892.

Application filed October 16, 1891. Serial No. 408,922. (No model.)

To aZZu/hom it may conce-WL:

Be it known that LSlLAs HARRIS, aocitizen of the United States, residingin the city and county of San Francisco, State of California, haveinvented certain new and useful Improvements in Railway-Chairs; and Ihereby declare the following description and drawings accompanying andforming a partof the same to be a full and exact description of myinvention.

My invention relates to what are called railway-chairs, employed tosustain and attach to the ties or sleepers railway-bars of T-section orother form having bottom fianges for that purpose.

My invention consists in forming such raili way-chairs from a singlepiece and of uniform section,except the top flanges, which areIeinforced by being folded and welded together, forming a double sectionof the bar at that point and providing Inore bearing and greaterstability for clamping-bolts that hold and secure the rail, as will behereinafter more fully explained in connection with the drawings, inwhich- Figure l is an elevation in perspective of one of my improvedrailway-chairswith a section of rail mounted thereon, showing, also, aportion of the sleeper or tie to which the chair is'fastened. Fig. 2 isan end view of the same chair, disclosing its transverse section, alsoshowing more clearly the manner of attaching the rail thereto; and Fig.3 is a plan of my improved railway-chair when detached.

Similar letters of reference on these different figures of the drawingsare employed to in- .dicate correspon ding parts.

In the construction of railway-chairs it is often desirable andpreferable to fasten the rails by means of clamping-bolts, thusproviding for convenient removal of the rails, and also to avoid bendingclips or lugs made integral with the chair or fastened thereto, whichendangers fracture with any but the higher grades of metal.

Clamping-bolts inserted through the ordinary section or throughl asection strong enough for all other functions of the chair are unstableunder heavy strain, because of the thinness of the section they passthrough. The strain upon sch clamping-bolts is divided between thesefulcra-the pressure on the head at one side and pressure against thelhole through which they pass.

upper and lowerA edges diagonally of the So it follows that byincreasing the distance between the two points last named by addingthickness correspondingly increases the strength of the clamping-boltsand the force with which they may act. This is a principle of part of myinvention, which I will now proceed to explain with the aid of thedrawings. The chair is made from one piece of metal, the top Bauges L L,bottom fianges M, and diagonal webs N being formed integrally from a barof uniform section, the top flanges being folded and welded together atO, where the clamp-bolts P pass through. As this welding at Oconstitutes the cross member Qa direct tie, rnechanical joining ofthevertical webs at R can be dispensed with; or in the case of heavyservice rivets can be inserted therein.

The clamp-bolts P P pass through adouble thickness ot' metal, as shownin Figs. l and 2, and are thus stiffenedand supported against deflectionbydiagonal strain of the heads acting on one sideonly. The sleeper orties S, rail T, and holding-down spikes V,being of the usualconstruction, do not require description here. I

Having thus described the nature and Objects of my invention, with themanner of constructing and applying the same, what I claim as new,anddesire to secure by Letters Patent, is-.

1. A railwaychair, as herein described, formed, primarily, of a barhaving a uniform section, with top flanges L L folded and weldedtogether so as to tie and support the vertical webs N and reinforce thetop fianges for clamping-screws P P, substantiallyin the manner and forthe objects described.

2. In a railway-chair, as herein described, the diagonal web-plates N,abutting together below the top flanges L L, the latter folded andwelded to increase the thickness when the clamping-bolts P P passthrough, in the manner described, substantially as and for the purposesspecified.

IOO

fixed my signature in the presence of two witnesses.

SILAS HARRIS.

Witnesses:

ALFRED A. ENoUIST,' WILSON D. BENT, Jr.

